/* ========================================
   浙江乡风工程设计有限公司 - 官网样式表
   符合W3C标准，兼容主流浏览器，支持响应式布局
   ======================================== */

/* ===== CSS Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0d5ca5;
    --primary-dark: #083b6e;
    --primary-light: #1a7bd4;
    --accent: #00a896;
    --accent-light: #02c39a;
    --gold: #c4963a;
    --gold-light: #d4a84b;
    --text: #2d3436;
    --text-light: #636e72;
    --text-lighter: #b2bec3;
    --bg: #ffffff;
    --bg-light: #f7f9fc;
    --bg-dark: #0a1628;
    --border: #e0e6ed;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: 0.3s ease;
    --max-width: 1280px;
    --nav-height: 72px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
    min-width: 320px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover { color: var(--primary-dark); }

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol { list-style: none; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Top Bar ===== */
.top-bar {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    font-size: 0.8rem;
    padding: 6px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.top-bar a {
    color: rgba(255,255,255,0.9);
}

.top-bar a:hover { color: #fff; }

.top-bar .contact-info span {
    margin-right: 20px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* ===== Header / Navigation ===== */
.header {
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
    transition: box-shadow var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--nav-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.logo-text h1 {
    font-size: 1.25rem;
    color: var(--primary-dark);
    font-weight: 700;
    line-height: 1.2;
}

.logo-text span {
    font-size: 0.7rem;
    color: var(--text-light);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav a {
    display: block;
    padding: 10px 18px;
    font-size: 0.95rem;
    color: var(--text);
    border-radius: 6px;
    position: relative;
    font-weight: 500;
    transition: all var(--transition);
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
    background: rgba(13, 92, 165, 0.06);
}

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    z-index: 1001;
    background: none;
    border: none;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2.5px;
    background: var(--primary-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #fff;
    z-index: 999;
    padding: 100px 30px 30px;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    transition: right 0.35s ease;
}

.mobile-nav.open { right: 0; }

.mobile-nav a {
    display: block;
    padding: 14px 0;
    font-size: 1.05rem;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
}

.mobile-nav a:hover,
.mobile-nav a.active {
    color: var(--primary);
}

.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 998;
}

.mobile-overlay.show { display: block; }

/* ===== Hero / Banner ===== */
.hero {
    position: relative;
    height: 560px;
    background: linear-gradient(135deg, #0a1628 0%, #0d2b52 30%, #123d6b 60%, #0d5ca5 100%);
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(0,168,150,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(13,92,165,0.2) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-particles span {
    position: absolute;
    display: block;
    width: 2px;
    height: 80px;
    background: linear-gradient(transparent, rgba(255,255,255,0.15), transparent);
    animation: particleFloat 8s infinite;
}

.hero-particles span:nth-child(1) { left: 10%; animation-delay: 0s; animation-duration: 10s; }
.hero-particles span:nth-child(2) { left: 25%; animation-delay: 2s; animation-duration: 8s; }
.hero-particles span:nth-child(3) { left: 40%; animation-delay: 4s; animation-duration: 12s; }
.hero-particles span:nth-child(4) { left: 55%; animation-delay: 1s; animation-duration: 9s; }
.hero-particles span:nth-child(5) { left: 70%; animation-delay: 3s; animation-duration: 11s; }
.hero-particles span:nth-child(6) { left: 85%; animation-delay: 5s; animation-duration: 7s; }

@keyframes particleFloat {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    color: #fff;
}

.hero-content .subtitle {
    font-size: 0.9rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent-light);
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-content h2 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff, #a8d8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.75);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0,168,150,0.3);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
    color: #fff;
    transform: translateY(-1px);
}

.btn-white {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
}

.btn-white:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0,0,0,0.15);
    color: var(--primary);
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-lg);
    padding: 36px;
    width: 100%;
    max-width: 420px;
}

.hero-card .stat-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 28px;
}

.hero-card .stat-item {
    text-align: center;
}

.hero-card .stat-num {
    font-size: 2.2rem;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.hero-card .stat-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
    margin-top: 6px;
}

.hero-card .stat-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
    margin: 24px 0;
}

.hero-card .cert-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.hero-card .cert-tag {
    padding: 6px 14px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 20px;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.8);
}

/* ===== Section Styles ===== */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--bg-light);
}

.section-dark {
    background: var(--bg-dark);
    color: #fff;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header .section-tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(13,92,165,0.08);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.section-header .divider {
    width: 50px;
    height: 3px;
    background: var(--accent);
    margin: 0 auto 16px;
    border-radius: 2px;
}

.section-header p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    font-size: 0.95rem;
}

.section-dark .section-header h2 { color: #fff; }
.section-dark .section-header p { color: rgba(255,255,255,0.65); }
.section-dark .section-header .section-tag {
    background: rgba(255,255,255,0.1);
    color: var(--accent-light);
}

/* ===== About Section (Home) ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.about-image .exp-badge {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: var(--accent);
    color: #fff;
    padding: 16px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: 0 8px 24px rgba(0,168,150,0.3);
}

.about-image .exp-badge .num {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.about-image .exp-badge .txt {
    font-size: 0.75rem;
    opacity: 0.9;
}

.about-content h3 {
    font-size: 1.5rem;
    color: var(--primary-dark);
    margin-bottom: 16px;
}

.about-content p {
    color: var(--text-light);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border-left: 3px solid var(--accent);
}

.about-feature .icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.about-feature h4 {
    font-size: 0.9rem;
    color: var(--primary-dark);
    margin-bottom: 4px;
}

.about-feature p {
    font-size: 0.8rem;
    margin: 0;
}

/* ===== Business Cards ===== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.business-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: transform var(--transition);
}

.business-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.business-card:hover::before {
    transform: scaleX(1);
}

.business-card .card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: rgba(13,92,165,0.06);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.business-card h4 {
    font-size: 1.05rem;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.business-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Projects Section (Home) ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-card .card-img {
    height: 220px;
    overflow: hidden;
    position: relative;
}

.project-card .card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .card-img img {
    transform: scale(1.08);
}

.project-card .card-img .category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 5px 12px;
    background: var(--accent);
    color: #fff;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.project-card .card-body {
    padding: 20px;
}

.project-card .card-body h4 {
    font-size: 1.05rem;
    color: var(--primary-dark);
    margin-bottom: 6px;
}

.project-card .card-body p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== Honor Section (Home) ===== */
.honors-scroll {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.honor-item {
    text-align: center;
    padding: 32px 20px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.honor-item:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.25);
    transform: translateY(-4px);
}

.honor-item .honor-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.honor-item h4 {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 6px;
}

.honor-item p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 70px 0;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 12px;
}

.cta-section p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 28px;
    font-size: 1rem;
}

/* ===== Footer ===== */
.footer {
    background: #0a121f;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo-icon {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.85rem;
    margin-top: 12px;
    line-height: 1.8;
    color: rgba(255,255,255,0.5);
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

.footer-col a {
    display: block;
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
    padding: 6px 0;
    transition: all var(--transition);
}

.footer-col a:hover {
    color: #fff;
    padding-left: 6px;
}

.footer-col .contact-item {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.footer-col .contact-item .ci-icon {
    flex-shrink: 0;
    color: var(--accent);
}

.footer-bottom {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    flex-wrap: wrap;
    gap: 12px;
}

/* ===== Page Banner (Sub Pages) ===== */
.page-banner {
    height: 300px;
    background: linear-gradient(135deg, #0a1628, #0d3b6e);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(0,168,150,0.1) 0%, transparent 60%);
}

.page-banner .container {
    position: relative;
    z-index: 2;
}

.page-banner h2 {
    font-size: 2.4rem;
    color: #fff;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-banner .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.page-banner .breadcrumb a {
    color: rgba(255,255,255,0.6);
}

.page-banner .breadcrumb a:hover { color: #fff; }

/* ===== About Page ===== */
.about-page-company {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.about-page-company .about-text h3 {
    font-size: 1.5rem;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.about-page-company .about-text p {
    color: var(--text-light);
    margin-bottom: 14px;
    font-size: 0.95rem;
    line-height: 1.8;
}

.about-page-company .about-text .quality-box {
    background: var(--bg-light);
    border-left: 4px solid var(--accent);
    padding: 20px 24px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-top: 24px;
}

.about-page-company .about-text .quality-box h4 {
    color: var(--primary-dark);
    margin-bottom: 12px;
    font-size: 1rem;
}

.about-page-company .about-text .quality-box ul {
    list-style: disc;
    padding-left: 20px;
}

.about-page-company .about-text .quality-box li {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.about-image-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 200px 200px;
    gap: 12px;
}

.about-image-grid .big-img {
    grid-row: 1 / 3;
}

.about-image-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius);
}

/* Culture */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.culture-card {
    background: #fff;
    padding: 32px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.culture-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.culture-card .culture-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
}

.culture-card h4 {
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.culture-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Core Values */
.values-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.value-item {
    text-align: center;
    padding: 28px 20px;
    background: var(--bg-light);
    border-radius: var(--radius);
}

.value-item .value-num {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-weight: 700;
    font-size: 1.2rem;
}

.value-item h4 {
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.value-item p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Responsibility */
.responsibility-list {
    counter-reset: resp;
    max-width: 800px;
    margin: 0 auto;
}

.resp-item {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    padding: 24px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border-left: 3px solid var(--accent);
    counter-increment: resp;
}

.resp-item .resp-num {
    width: 44px;
    height: 44px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.resp-item h4 {
    color: var(--primary-dark);
    margin-bottom: 6px;
}

.resp-item p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== Business Page ===== */
.business-main-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.biz-category {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.biz-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.biz-category .biz-header {
    padding: 28px 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    text-align: center;
}

.biz-category .biz-header .biz-icon {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.biz-category .biz-header h3 {
    font-size: 1.15rem;
}

.biz-category .biz-body {
    padding: 24px;
}

.biz-category .biz-body li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-light);
    border-bottom: 1px dashed var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.biz-category .biz-body li::before {
    content: '▸';
    color: var(--accent);
    font-size: 0.7rem;
}

.biz-category .biz-body li:last-child {
    border-bottom: none;
}

.patent-section {
    margin-top: 60px;
}

.patent-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.patent-card {
    background: linear-gradient(135deg, #fff, var(--bg-light));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    transition: all var(--transition);
}

.patent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.patent-card .patent-icon {
    font-size: 2.5rem;
    margin-bottom: 14px;
}

.patent-card h4 {
    color: var(--primary-dark);
    font-size: 1rem;
    margin-bottom: 8px;
}

.patent-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Projects Page ===== */
.project-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border: 1.5px solid var(--border);
    background: #fff;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text);
    transition: all var(--transition);
    font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.projects-page-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-item {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    position: relative;
    transition: all var(--transition);
}

.project-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-item .proj-img {
    height: 240px;
    overflow: hidden;
    position: relative;
}

.project-item .proj-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-item:hover .proj-img img {
    transform: scale(1.08);
}

.project-item .proj-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 40%, rgba(0,0,0,0.75));
    display: flex;
    align-items: flex-end;
    padding: 20px;
    opacity: 0;
    transition: opacity var(--transition);
}

.project-item:hover .proj-overlay {
    opacity: 1;
}

.project-item .proj-overlay span {
    color: #fff;
    font-weight: 600;
    font-size: 1.05rem;
}

.project-item .proj-info {
    padding: 18px;
    background: #fff;
}

.project-item .proj-info h4 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin-bottom: 6px;
}

.project-item .proj-info .proj-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(0,168,150,0.1);
    color: var(--accent);
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.92);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.lightbox.open { display: flex; }

.lightbox img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 4px;
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 32px;
    font-size: 2.5rem;
    color: #fff;
    cursor: pointer;
    background: none;
    border: none;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2.5rem;
    color: #fff;
    cursor: pointer;
    background: rgba(255,255,255,0.1);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-prev { left: 32px; }
.lightbox-next { right: 32px; }
.lightbox-prev:hover,
.lightbox-next:hover { background: rgba(255,255,255,0.25); }

/* ===== Innovation Page ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    text-align: center;
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.team-card .team-avatar {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 28px auto 16px;
    color: #fff;
    font-size: 2.2rem;
    font-weight: 700;
}

.team-card .team-body {
    padding: 0 20px 24px;
}

.team-card .team-body h4 {
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 4px;
}

.team-card .team-body .role {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 8px;
}

.team-card .team-body .edu {
    font-size: 0.8rem;
    color: var(--text-light);
}

.team-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.team-stat {
    text-align: center;
    padding: 32px 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: var(--radius);
}

.team-stat .stat-num {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.team-stat .stat-label {
    font-size: 0.9rem;
    opacity: 0.85;
}

/* Achievements */
.achievement-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.achievement-card {
    padding: 28px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    text-align: center;
    transition: all var(--transition);
}

.achievement-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.achievement-card .ach-icon {
    font-size: 2.5rem;
    margin-bottom: 14px;
}

.achievement-card h4 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.achievement-card p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== Contact Page ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info-cards {
    display: grid;
    gap: 20px;
}

.contact-info-card {
    display: flex;
    gap: 18px;
    padding: 24px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.contact-info-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
}

.contact-info-card .ci-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.contact-info-card h4 {
    color: var(--primary-dark);
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.contact-info-card p {
    color: var(--text-light);
    font-size: 0.85rem;
}

.contact-form-wrap {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.contact-form-wrap h3 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.contact-form-wrap > p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text);
    transition: border-color var(--transition);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-submit {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.form-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* Map Section */
.map-section {
    height: 400px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1rem;
}

.map-section .map-placeholder {
    text-align: center;
}

.map-section .map-placeholder .map-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

/* ===== News Page ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-card .news-icon-wrap {
    height: 160px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
}

.news-card .news-body {
    padding: 20px;
}

.news-card .news-body h4 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-card .news-body p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 12px;
}

.news-card .news-body .news-date {
    font-size: 0.8rem;
    color: var(--text-lighter);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 3000;
    box-shadow: 0 8px 24px rgba(0,168,150,0.3);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
    display: none;
}

.toast.show { display: block; }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: 0 4px 16px rgba(13,92,165,0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .business-grid { grid-template-columns: repeat(2, 1fr); }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .projects-page-grid { grid-template-columns: repeat(2, 1fr); }
    .business-main-grid { grid-template-columns: repeat(2, 1fr); }
    .honors-scroll { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    .hero .container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
    .hero-content p { max-width: 100%; }
    .hero-buttons { justify-content: center; }
    .hero { height: auto; padding: 80px 0 60px; }
    .hero-visual { display: none; }
    .hero-content h2 { font-size: 2.2rem; }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-image img { height: 320px; }

    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }

    .culture-grid,
    .values-list { grid-template-columns: repeat(2, 1fr); }

    .about-page-company { grid-template-columns: 1fr; gap: 40px; }
    .about-image-grid { grid-template-rows: 180px 180px; }

    .team-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root { --nav-height: 64px; }

    .top-bar { display: none; }

    .nav { display: none; }
    .hamburger { display: flex; }
    .mobile-nav { display: block; }

    .section { padding: 50px 0; }
    .section-header { margin-bottom: 36px; }
    .section-header h2 { font-size: 1.7rem; }

    .hero { padding: 60px 0 50px; }
    .hero-content h2 { font-size: 1.8rem; }
    .hero-card .stat-num { font-size: 1.6rem; }

    .about-features { grid-template-columns: 1fr; }
    .business-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .honors-scroll { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }

    .projects-page-grid { grid-template-columns: 1fr 1fr; }
    .business-main-grid { grid-template-columns: 1fr; }
    .team-grid { grid-template-columns: 1fr 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .achievement-grid { grid-template-columns: 1fr 1fr; }
    .patent-grid { grid-template-columns: 1fr; }

    .culture-grid { grid-template-columns: 1fr; }
    .values-list { grid-template-columns: 1fr 1fr; }

    .page-banner { height: 220px; }
    .page-banner h2 { font-size: 1.8rem; }

    .contact-form-wrap { padding: 24px; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }

    .hero-content h2 { font-size: 1.5rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }

    .projects-page-grid { grid-template-columns: 1fr; }
    .team-grid { grid-template-columns: 1fr; }
    .achievement-grid { grid-template-columns: 1fr; }
    .values-list { grid-template-columns: 1fr; }
    .team-stats { grid-template-columns: 1fr; }

    .section-header h2 { font-size: 1.5rem; }
}